*
[tex]y = 3x - 5[/tex]
[tex]y - 3x = - 5[/tex]
[tex] - 3x + y = - 5[/tex]
[tex]3x - y = 5[/tex]
ANSWER:
[tex]3x - y = 5[/tex]
*
[tex]y = - \frac{3}{2} x + 15[/tex]
[tex]y + \frac{3}{2} x = 15[/tex]
[tex]2y + 3x = 30[/tex]
[tex]3x + 2y = 30[/tex]
ANSWER:
[tex]3x + 2y = 30[/tex]
that's all... hope it helps...